Massage instrument.



v No. 789,083.- PATENTBD SEPT. 15, 1903.

. J. W. HYATT.

MASSAGE INSTRUMENT.

APPLICATION FILED JAN. 26. 1903.

N0 MODEL.

:5 PETERS co PHOTO-LITHOH WASHINGTON a c No. 739,083. Patented September 15, 1903. UNITED STATES PATENT OFFIC JOHN W. HYATT, OF- NEWARK, NEW JERSEY, ASSIGNOR OF ONE-HALF TO DAVID BLAKE, OF NEWARK, NEW JERSEY.

MASSAGE INSTRUMENT.

.EPEGIFICATION forming part of Letters Patent No. 739,083, dated September 15, 1903.

Application filed January 26, 1903. $erial No. 140,484. (No model.)

To all whom it may concern: Whether the shell be embraced by the hand Be it known that I, JOHN W. HYATT, a citior supported by a handle it is operated by the zen of the United States, residing at 14.1 Comreactionary force of the weight and requires merce street, Newark, county of Essex, State no connection with any auxiliary mechanism of New Jersey, have invented certain new to'produce the vibrations.

and useful Improvements in Reaction Mas- Heretofore massage instruments have been sage Instruments, fully described and represupported movably upon a holder which is sented in the following specification and the sustained by an operator against whom the accompanying drawings, forming a part of reaction of the'instrument is exerted; butin \o the same. the presentinvention theinstrumentrequires The object of the present invention is to no holder and no operator to sustain its reacfurnish a massage instrument which is opertion, but operates directly upon the part of ated entirely by a reactionary force within its the body with which it is in contact, and may own shell, so as to require no attachment to thus be held and used by the patient without 15 auxiliary mechanism for vibrating the instruassistance. 5 ment. The invention in several modified forms is The invention comprises a massageinstrushown in the annexed drawings, in whichment having an external shell vibrated by the Figure 1 represents the shell gnasped by reaction of an unbalanced weight journaled the hand and connected with a flexible shaft.

20 within the shell. The rotating weightis con- Fig. 2 is a longitudinal section of the same. nected to a flexible shaft or other suitable Fig. 3 is a cross-section on line 3 3 in Fig. 2. driver, and when the unbalancedweight is Fig. 4 is a cross-section showing a rotatable driven at a suitable speed it causes vibration plug with several holes, which may be filled ot' the shell by the direct reaction of the to vary the operation of the plug. Fig. 5 is 25 weight upon its journal. In the simplest a longitudinal section of another alternative form of the invention the shell is provided construction, and Fig. 6 shows the shell with with a cylindrical bore and the weight is an attached handle for applying it to various formed as a cylindrical-plug fitted rotatably parts of the body. tosaid bore and provided at one side with Figs. 1, 2,'and 3 show the shell of cylin- 0 one or more holes to throw it out of balance. drical form with the driving-spindle 1) pro- The shell in such case is provided with heads jected from one end for connection with a to hold the revolving plug in place, and a flexible shaft 0. The shell is of cylindrical spindle is extended from the plug through form to be grasped by the hand, as shown in the center of one of the heads to attach a fiexi- Fig. 1. To the cylindrical bore of the shell 35 ble shaft for driving the same. In this cona cylindrical 'plug d is shown in Figs. 2 and struction the bore of theshell operates as a 3, fitted rotatably and attached to the spinbearing inwhich the entire plug isjournaled; dle c. The plug is shown with an eccenbut the plug may be constructed to clear the trically disposed hole e extended through interior of the shell and journaled to the nearly its entire length, the metal of the 40 heads, so that the reaction of the weight acplug being thus lightened upon one side, so

- tuates the shell through the agency of the that the weight is unbalanced when the plug heads. The shell when made of cylindrical is turned upon its axis by rotation within the form may be grasped by the hand, so as to shell. The plug is thus journaled to the bore operate upon the hand itself; but the shell of the shell and transmits the vibrations di- 45 may also be made with a supporting-handle rectly to the shell. Fig. 4 shows the plug 5 at one side and formed of any suitable shape formed with three holese, e, and 6 any of for application by the handle to different which may be filled by a plug e to vary the parts of the body. The shell may in such center of gravityof the plug, and thus modify case, if desired, be provided with a pad to fit the vibrations when desired. Fig. 5 shows 50 the portion of the body upon which it is used. the plug with a hole 6 extended one-half its A i l length inward from one end and ahole 6 extended one-half its length inward from the opposite end and the holes formed upon opposite sides of the plug, so as to unbalance the opposite ends upon opposite sides, and thus produce opposite vibrations of the shell at opposite ends of the same. The shell is shown in Fig. 2 threaded internally at opposite ends and the hcadsfand g screwed into the ends to hold the plugd in place. Wit-h the construction shown in Fig. 5 the spindle c is extended through both heads and is journaled therein, and the plug is made to clear the shell, so that its vibrations operate upon its bearings in the heads, and thus vibrate the shell. Fig. 6 shows a handle it extended from one side of the shell and the latter represented of greater diameter than length. It is obvious that as the diameter is increased the centrifugal force of the unbalanced weight is also increased, so that the vibrations of the shell may by suitably proportioning the shell and weight be adapted for operation upon difierent parts or organs of the body. The rotating weight, Whether fitted to the bore of the shell or not, forms the vibrator of the instrument, and I have therefore termed the plug a vibrator-plug in the claims appended hereto.

It will be observed that this massage instrument requires only a single rotating partnamely, the unbalanced weight dfor connection with the driving-shaft c, and it thus dilfers essentially from all massage instruments which employ an eccentric crank or other analogous means located upon a supporting-frame and requiring connections to the massageinstrumentfor vibratingthesame in relation to and independently of such frame.

Having thus set forth the nature of the invention, what is claimed herein is- V 1. A massage instrument having an external shell for contact with the body, an internal unbalanced weight journaled to the said shell, and means for rotating the weight to vibrate the shell.

2. A massage instrument having an external shell for contact with the body, an unbalanced weight fitted rotatably to the inner surface of the shell, and means for rotating the weight to vibrate the shell.

3. Amassageinstrumenthavingashellprovided with cylindrical bore, a vibrator fitted rotatably to said bore, and weighted upon one side as set forth, and means for rotating the weight to vibrate the shell.

4. A massage instrumenthavingashell provided with cylindrical bore, a vibrator-plug fitted rotatably to said bore, and provided at 'one side with one or more holes to throw it out of balance.

5. A massage instrumenthavingashell provided with cylindrical bore, a vibrator-plug fitted rotatably to said bore, and provided at one side with one or more holes to throw it out of balance, and means for filling any of said holes at pleasure to vary the center of gravity.

6. A massageinstrumenrhavingashellprovided with cylindrical bore, a vibrator-plug fitted rotatably to said bore, and provided at opposite ends with holes upon opposite sides of its axis to produce opposed vibrations at the opposite ends of'the shell, and means for rotating the plug within the shell.

7. A massage instrument having an external shell for contact with the body, an internal unbalanced weight journaled within the said shell, means for rotating the weight to vibrate the shell, and a handle attached to the shell for applying it to the body.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOHN W. IIYAT'I.

Witnesses:

'FRANK L. MORTON,

LEAVITT MERSEREAU. 

